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Finding the Fourth Proportional to 8,721.86, 13,082.80 and 7,176.62

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Solution

The fourth proportional to 8,721.86, 13,082.80 and 7,176.62 is: 10,764.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.86 : 13,082.80 = 7,176.62 : x
  2. Step 2: Convert to fraction form
    8,721.86/13,082.80 = 7,176.62/x
  3. Step 3: Cross multiply
    8,721.86x = 13,082.80 × 7,176.62
  4. Step 4: Simplify right side
    8,721.86x = 93,890,238.77
  5. Step 5: Solve for x
    x = 93,890,238.77/8,721.86
  6. Step 6: Final answer
    x = 10,764.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.